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      1 //===-- MBlazeSubtarget.h - Define Subtarget for the MBlaze ----*- C++ -*--===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file declares the MBlaze specific subclass of TargetSubtargetInfo.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef MBLAZESUBTARGET_H
     15 #define MBLAZESUBTARGET_H
     16 
     17 #include "llvm/Target/TargetSubtargetInfo.h"
     18 #include "llvm/MC/MCInstrItineraries.h"
     19 #include <string>
     20 
     21 #define GET_SUBTARGETINFO_HEADER
     22 #include "MBlazeGenSubtargetInfo.inc"
     23 
     24 namespace llvm {
     25 class StringRef;
     26 
     27 class MBlazeSubtarget : public MBlazeGenSubtargetInfo {
     28 
     29 protected:
     30   bool HasBarrel;
     31   bool HasDiv;
     32   bool HasMul;
     33   bool HasPatCmp;
     34   bool HasFPU;
     35   bool HasMul64;
     36   bool HasSqrt;
     37   bool HasItin;
     38 
     39   InstrItineraryData InstrItins;
     40 
     41 public:
     42 
     43   /// This constructor initializes the data members to match that
     44   /// of the specified triple.
     45   MBlazeSubtarget(const std::string &TT, const std::string &CPU,
     46                   const std::string &FS);
     47 
     48   /// ParseSubtargetFeatures - Parses features string setting specified
     49   /// subtarget options.  Definition of function is auto generated by tblgen.
     50   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
     51 
     52   /// Compute the number of maximum number of issues per cycle for the
     53   /// MBlaze scheduling itineraries.
     54   void computeIssueWidth();
     55 
     56   /// enablePostRAScheduler - True at 'More' optimization.
     57   bool enablePostRAScheduler(CodeGenOpt::Level OptLevel,
     58                              TargetSubtargetInfo::AntiDepBreakMode& Mode,
     59                              RegClassVector& CriticalPathRCs) const;
     60 
     61   /// getInstrItins - Return the instruction itineraies based on subtarget.
     62   const InstrItineraryData &getInstrItineraryData() const { return InstrItins; }
     63 
     64   bool hasItin()   const { return HasItin; }
     65   bool hasPCMP()   const { return HasPatCmp; }
     66   bool hasFPU()    const { return HasFPU; }
     67   bool hasSqrt()   const { return HasSqrt; }
     68   bool hasMul()    const { return HasMul; }
     69   bool hasMul64()  const { return HasMul64; }
     70   bool hasDiv()    const { return HasDiv; }
     71   bool hasBarrel() const { return HasBarrel; }
     72 };
     73 } // End llvm namespace
     74 
     75 #endif
     76